The ornamental design for a stringlight, as shown and described.
FIG. 1 is a perspective view of a string light showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlanged view of portion 9 shown in FIG. 1;
FIG. 10 is an enlanged view of portion 10 shown in FIG. 1; and,
FIG. 11 is an enlanged view of portion 11 shown in FIG. 2.
The string light is shown with a symbolic break in its length and the appearance of any portion of the string light between the break lines form no part of the claimed design. The broken lines in the drawings depict portions of the string light that form no part of the claimed design. The long dash short dash broken lines that appear in FIGS. 1 and 2 denote the enlarged portions of FIGS. 9, 10 and 11 and form no part of the claimed design.